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    <title>Document</title>
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    <script>
      function test(bool) {
        return new Promise((resolve, reject) => {
          if (bool) {
            resolve('成功')
          } else {
            reject('失败')
          }
        })
      }
      //  .finally(() => { console.log('总是执行的函数') })
      test(false)
        .then(res => {
          console.log(res)
        })
        .catch(err => {
          console.log(err)
        })
        .finally(() => {
          console.log('总是执行的函数')
        })
      //
    </script>
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